The world of cryptocurrency and NFTs is riddled with controversy, but somewhere amid all of that blockchain there's some reckoning with reality that must be done.

Today we’re going to go a little meta and talk about how computer science can support learning with educational technology. We here at Crash Course are big fans of interactive in-class learning and hands-on experiences, but we also...

Happy pi day! Did you know that in some of his notes, Euler used the symbol pi to represent 6.28..., before the more familiar 3.14... took off as a standard?

We've all heard that robots are going to take our jobs -- but what can we do about it? Innovation expert David Lee says that we should start designing jobs that unlock our hidden talents and passions -- the things we spend our weekends...

In the developing world, access to incubators is limited by cost and distance, and millions of premature babies die each year. TED Fellow Jane Chen shows an invention that could keep millions of these infants warm -- a design that's...

Legendary scientist David Deutsch puts theoretical physics on the back burner to discuss a more urgent matter: the survival of our species. The first step toward solving global warming, he says, is to admit that we have a problem.

Hank discusses some of the recent developments in synthetic biology, and why some advocacy groups are calling for a moratorium on those developments.

In which John Green, Hank Green, and Emily Graslie teach you about the Anthropocene, an unofficial geological era that covers the last century or so, in which humanity has made massive progress. We've discovered the Higgs-Boson particle,...

Why do we often neglect big problems, like the financial crisis and climate change, until it's too late? Policy strategist Michele Wucker urges us to replace the myth of the "black swan" -- that rare, unforeseeable, unavoidable...

Just how long could you survive on the surface of Mars without a spacesuit? Find out what it'd be like to stand on the surface of Mars, if you forgot to pack properly.

One day we might be able to live on Mars thanks to red wine, and domes made out of a very strange material, but don't pack your suitcase just yet.

Think of penguins as ocean sentinels, says Dee Boersma -- they're on the frontlines of sea change. Sharing stories of penguin life and culture, she suggests that we start listening to what penguins are telling us.

In our final episode of Crash Course Engineering we are going to take all the tools and ideas we’ve discussed throughout this series and try to imagine where we’re headed. We’re going to explore some of the biggest problems that today’s...

What would happen if we could generate power from our windowpanes? In this moving talk, entrepreneur Justin Hall-Tipping shows the materials that could make that possible, and how questioning our notion of 'normal' can lead to...

Like all of us, economist Tyler Cowen loves a good story. But in this intriguing talk, he asks us to step away from thinking of our lives -- and our messy, complicated irrational world -- in terms of a simple narrative.

We increasingly make decisions based on short-term goals and gains -- an approach that makes the future more uncertain and less safe. How can we learn to think about and plan for a better future in the long term ... like,...

You’ve probably heard a lot about how climate change is affecting our planet, but did you know a warming climate also affects objects in space?

Josh Silver delivers his brilliantly simple solution for correcting vision at the lowest cost possible -- adjustable, liquid-filled lenses. At TEDGlobal 2009, he demos his affordable eyeglasses and reveals his global plan to distribute...

Creating a Mars colony is a dream for many people, but it comes with some unique and challenging problems.

This week on SciShow Space News, we finally find out what’s causing those dark lines on Europa. Plus, learn how to become space-famous!

Nilofer Merchant suggests a small idea that just might have a big impact on your life and health: Next time you have a one-on-one meeting, make it into a "walking meeting" -- and let ideas flow while you walk and talk.

Whether you've got the latest iPhone or the same flip phone you've had since 2002, you're still asked to turn off your device before take off. Why is that?

A founding member of the Axis of Evil Comedy Tour, standup comic Maz Jobrani riffs on the challenges and conflicts of being Iranian-American -- "like, part of me thinks I should have a nuclear program; the other part thinks I can't be...

COVID isn’t the only virus to cause long-lasting symptoms. Other viruses - including the flu - can have similar enduring effects on our tissues and immune systems.